s1651: updated classes and unit tests for searches

...ol-Server/src/ca/nrc/cadc/ac/server/GroupPersistence.java

...rol-Server/src/ca/nrc/cadc/ac/server/UserPersistence.java

...l-Server/src/ca/nrc/cadc/ac/server/ldap/LdapGroupDAO.java

.../src/ca/nrc/cadc/ac/server/ldap/LdapGroupPersistence.java

...ol-Server/src/ca/nrc/cadc/ac/server/ldap/LdapUserDAO.java

...r/src/ca/nrc/cadc/ac/server/ldap/LdapUserPersistence.java

...test/src/ca/nrc/cadc/ac/server/ldap/LdapGroupDAOTest.java

.../test/src/ca/nrc/cadc/ac/server/ldap/LdapUserDAOTest.java

.../cadcAccessControl/src/ca/nrc/cadc/ac/ActivatedGroup.java